Compute the Sample Mean Statistics Worksheet Paper Assignment Help

Compute the Sample Mean Statistics Worksheet Paper Assignment Help

 
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Worksheet # 5- Probability to make decisions about Data.
Psych 5 – Statistics




In a test of physical fitness, a group of men ages 65 and older from a local retirement
community were told to do as many sit-ups as they could. It is known the population mean
is 20 with The scores for the men from the retirement community are given below.
Use a two-tailed rejection region with a total area of 0.05. What is the sample mean?
24 25 10 23 18 29 47 32
19 24 20 28 21 20 27 25
1.
The mean of the population is 200 on a test measuring math skills of middle school
students. The variance is
. The test scores for the students in Mr. Petri’s class at Suburban Middle School are
given below. Use a rejection region with a probability of 5% only in the upper tail.
What is the sample mean?
195 203 200 193 207 201 199 197
203 199 195 200 202 200 193 205
33(a) Suppose you flip a fair coin five times. Which of the following combinations is most
likely to occur? (Give explanation of your answer)
HHHHH
HTHTH
3(b) Professor White felt that he had a representative sample--but he starting to
wonder if he really did. Briefly note what might make Professor White feel this
way.
In a population µ =100 and  = 25. A sample of 150 people has x̅=120. Using
X
two tails and the .05 criterion. (a) What is the critical value? (b) Is this sample
mean in the region of rejection? How do you know? (c) What does the means
location indicate about the likelihood of this sample occurring in this population?